CN112283205A - Electric hydrostatic actuator lever loading test bed and loading test method - Google Patents
Electric hydrostatic actuator lever loading test bed and loading test method Download PDFInfo
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- CN112283205A CN112283205A CN202011134477.0A CN202011134477A CN112283205A CN 112283205 A CN112283205 A CN 112283205A CN 202011134477 A CN202011134477 A CN 202011134477A CN 112283205 A CN112283205 A CN 112283205A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/007—Simulation or modelling
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing
Abstract
The invention discloses a lever loading test bed for an electric hydrostatic actuator. Including installing the slider slide rail mechanism on mounting platform, draw pressure sensor, T type frame and test electricity sound liquid actuator, the slider inlays to be adorned on linear slide rail and slides on the horizontal direction along linear slide rail, slider and loading cylinder connecting block fixed connection, loading cylinder connecting block and loading cylinder fixed connection, the loading cylinder body articulates on mounting platform, T type frame articulates on mounting platform, linear slide rail and T type frame one end fixed connection, the other end and the connecting piece upper end of T type frame are articulated, test electricity sound liquid actuator and connecting piece are connected, test electricity sound liquid actuator articulates on mounting platform. The test bed can realize the constant force loading and the sine alternating force loading of the electro-hydrostatic actuator, and the loading test can be better finished by simulating the actual working condition of the electro-hydrostatic actuator through the four quadrant loads.
Description
Technical Field
The invention belongs to the field of test beds of electric hydrostatic actuators, and particularly relates to a novel lever loading test bed of an electric hydrostatic actuator.
Background
The hydraulic system has the advantages of large power-mass ratio, small inertia, good steady-state property, fast dynamic response, stable motion and the like, so that the hydraulic system is widely applied to airplanes. With the development of electronic power and control technology, the continuous development of new materials, modern technology gradually affects the traditional hydraulic technology: firstly, the high-performance combat requirements of modern airplanes revolutionize airplane control systems; secondly, the application of the hydraulic system on the airplane is limited due to some problems inherent in the hydraulic system. In order to overcome the weaknesses of the hydraulic system and meet the design requirements of future airplanes, the development of a novel hydraulic system has become a necessary trend.
The electro-hydrostatic actuator is a novel electro-hydraulic transmission system, integrates the functions of machine, electricity and liquid, removes complex pipelines and mechanical structures compared with the traditional hydraulic system, improves the maintainability of equipment, and has the advantages of light weight, low noise, small volume and the like. Due to the high integration level, the performance test is complex, and therefore a loading test bed is needed to perform the performance test on the test bed.
The current loading schemes for electro-hydrostatic actuators are: loading by a weight, loading by a spring, and the like. The advantage of loading by using the weight is that loading with large load force can be realized, but the mass block needs to be replaced manually, continuous change of load force cannot be realized, and the load-bearing device has large limitation. The loading of alternating sinusoidal force can be conveniently realized by utilizing the spring for loading, but the constant force loading is difficult to realize.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a lever loading test bed for an electro-hydrostatic actuator, so as to realize a more comprehensive loading test.
The technical scheme adopted by the invention is as follows:
electric hydrostatic actuator lever loading test bed
The device comprises an installation platform, a slide block slide rail mechanism, a pulling pressure sensor, a T-shaped frame and a tested electric static and dynamic liquid actuator, wherein the slide block slide rail mechanism, the pulling pressure sensor, the T-shaped frame and the tested electric static and dynamic liquid actuator are installed on the installation platform, the slide block slide rail mechanism comprises a linear slide rail and a slide block, the slide block is embedded on the linear slide rail and slides in the horizontal direction along the linear slide rail, the slide block is fixedly connected with a loading cylinder connecting block, the lower end of the loading cylinder connecting block is fixedly connected with a cylinder rod of a.
The middle end of the T-shaped frame faces downwards and is hinged to the mounting platform, the linear slide rail is fixedly connected with one end of the two branch ends of the T-shaped frame, the other end of the two branch ends of the T-shaped frame is hinged to the upper end of the connecting piece, the upper end of the tested electric dynamic and static liquid actuator is connected with the lower end of the connecting piece through a pulling pressure sensor, and the lower end of the tested electric dynamic and static liquid actuator is hinged to the mounting platform.
The upper end of the tested electric dynamic and static liquid actuator is provided with a first extension bar, the upper end of the first extension bar is provided with a thread, the first extension bar is connected with the bottom end of the pull pressure sensor through the thread, the first bearing seat group is fixedly installed on the installation platform, and the lower end of the tested electric dynamic and static liquid actuator is hinged with the first bearing seat group through a fourth pin shaft.
The linear sliding rail is fixedly connected with one end of two branch ends of the T-shaped frame through a first bolt group, the second bearing seat group is connected with the mounting platform through a first connecting plate group, the middle end of the T-shaped frame faces downwards and is hinged and connected with the second bearing seat group through a second pin shaft, the second pin shaft is mounted on the second bearing seat group, and an input shaft of the first angle encoder is connected with the second pin shaft through a first coupler.
The upper end of the connecting piece is provided with a round through hole, a first pin shaft is arranged in the round through hole, the other end of the two branch ends of the T-shaped frame is hinged with the upper end of the connecting piece through the first pin shaft, and the lower end of the connecting piece is connected with the upper end of the tension and pressure sensor through a connecting bolt.
The upper end of the loading cylinder is provided with a second extension rod, the upper end of the second extension rod is tapped with threads, the second extension rod is connected with a loading cylinder connecting block through the threads, and the loading cylinder connecting block is fixedly installed with the sliding block through a second bolt group; the third bearing seat group is connected with the mounting platform through the second connecting plate group, the lower end of the loading cylinder is hinged to the third bearing seat group through a third pin shaft, the third pin shaft is mounted on the third bearing seat group, and an input shaft of the second angle encoder is connected with the third pin shaft through a second coupler.
The loading cylinder applies pressure or pulling force to the loading cylinder connecting block, the loading cylinder connecting block is connected with the sliding block, the force applied by the loading cylinder is transmitted to the linear slide rail, the linear slide rail is connected with the T-shaped frame, the applied force is transmitted to the T-shaped frame, and according to the lever principle, the force applied by the T-shaped frame is transmitted to the tested electric dynamic and static liquid actuator through the connecting piece and the pulling pressure sensor, so that the loading of the tested electric dynamic and static liquid actuator is completed.
The force applied by the loading cylinder to the tested electro-hydrostatic actuator is measured by the tension pressure sensor.
Second, loading test method applied to lever loading test bed of electro-hydrostatic actuator
The loading cylinder utilize the second extension bar upwards to stretch out or retract downwards and realize applying load power or reverse load power (pulling force or pressure) to the test electric dynamic and static liquid actuator, according to the change in the direction of the first extension bar motion direction of the test electric dynamic and static liquid actuator and the direction of the load power that receives, realize four big image limit loads:
loading in the first quadrant: a first extension rod of the tested electric dynamic and static liquid actuator extends upwards, a second extension rod of the loading cylinder applies pressure to the first extension rod of the tested electric dynamic and static liquid actuator, the movement direction of the first extension rod of the tested electric dynamic and static liquid actuator is opposite to the direction of the loaded force, and the value measured by the tension pressure sensor is pressure;
loading in the second quadrant: the first extension rod of the tested electric dynamic and static liquid actuator extends upwards, the second extension rod of the loading cylinder applies pulling force to the first extension rod of the tested electric dynamic and static liquid actuator, the moving direction of the first extension rod of the tested electric dynamic and static liquid actuator is the same as the direction of the loaded force, and the value measured by the pulling pressure sensor is the pulling force;
loading in the third quadrant: the first extension rod of the tested electric dynamic and static liquid actuator retracts downwards, the second extension rod of the loading cylinder exerts pulling force on the first extension rod of the tested electric dynamic and static liquid actuator, the moving direction of the first extension rod of the tested electric dynamic and static liquid actuator is opposite to the direction of the loaded force, and the value measured by the pulling pressure sensor is the pulling force;
loading in the fourth quadrant: the first extension rod of the tested electric dynamic and static liquid actuator retracts downwards, the second extension rod of the loading cylinder extends upwards, the second extension rod of the loading cylinder applies pressure to the first extension rod of the tested electric dynamic and static liquid actuator, the moving direction of the first extension rod of the tested electric dynamic and static liquid actuator is the same as the direction of the load force, and the value measured by the pressure sensor is pressure; pulling the pressure or tension measured by the pressure sensor;
draw pressure sensor to record and be used in pressure and pulling force on the electronic hydrostatic actuator, first angle encoder and second angle encoder record the angular displacement of revolute pair, handle the motion curve that obtains the first extension bar of the electronic hydrostatic actuator of test through the geometric relation, combine the atress condition and the motion condition of the electronic hydrostatic actuator of test, realize carrying out further capability test and analysis.
Based on the test bed, the test bed can complete multiple tests such as step characteristic test, sine displacement test, load fluctuation resistance test and the like on the tested electric dynamic and static liquid actuator.
The invention has the beneficial effects that:
the test bed can realize the constant force loading and sine alternating force loading of the electric hydrostatic actuator, and can simulate the actual working condition of the electric hydrostatic actuator through four quadrant loading so as to better complete the loading test.
Drawings
Fig. 1 is a schematic view of the overall assembly of the present invention.
FIG. 2 is a mounting diagram of the tested electro-hydrostatic actuator and the T-shaped frame.
Fig. 3 is an installation view of the loading cylinder and sled portion of the present invention.
In the figure, 1, a linear slide rail, 2, a loading cylinder connecting block, 2a, a second bolt group, 3, a sliding block, 4, a first bolt group, 5 and a T-shaped frame; 6. the device comprises a first pin shaft, 7, a connecting piece, 8, a tension and pressure sensor, 9, a tested electro-hydrostatic actuator, 9a, a first extension rod, 9b, a first ear ring, 10, a first bearing seat group, 10a, a first bearing seat, 10b, a second bearing seat, 11, an installation platform, 12, a first angle encoder, 13, a first coupler, 14, a second bearing seat group, 14a, a third bearing seat, 14b, a fourth bearing seat, 15, a first connecting plate group, 15a, a first connecting plate, 15b, a second connecting plate, 16 and a second pin shaft; 17. a second angle encoder; 18. a second coupling; 19. a third bearing seat group, 19a, a fifth bearing seat, 19b, a sixth bearing seat, 20 and a third pin shaft; 21. the loading cylinder is arranged on the first connecting plate group, 21a, the third connecting plate, 21b, the fourth connecting plate, 22a, a first extension rod, 22b, a first lug ring, 23 and a connecting bolt; 24. and a fourth pin shaft.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the device comprises a mounting platform 11, a slider slide rail mechanism, a tension pressure sensor 8, a T-shaped frame 5 and a tested electric hydro-static actuator 9, wherein the slider slide rail mechanism is mounted on the mounting platform 11 and comprises a linear slide rail 1 and a slider 3, the slider 3 is embedded on the linear slide rail 1 and slides along the linear slide rail 1 in the horizontal direction, the slider 3 is fixedly connected with a loading cylinder connecting block 2, the lower end of the loading cylinder connecting block 2 is fixedly connected with a cylinder rod of a loading cylinder 22, and a cylinder body of the loading cylinder 22 is hinged on the mounting platform 11.
The middle end of the T-shaped frame 5 is downwards hinged to the mounting platform 11, the linear sliding rail 1 is fixedly connected with one end of two branch ends of the T-shaped frame 5, the other end of the two branch ends of the T-shaped frame 5 is hinged to the upper end of the connecting piece 7, the upper end of the tested electric dynamic and static liquid actuator 9 is connected with the lower end of the connecting piece 7 through the pulling pressure sensor 8, and the lower end of the tested electric dynamic and static liquid actuator 9 is hinged to the mounting platform 11.
As shown in fig. 2, a first extension bar 9a is arranged at the upper end of the tested electro-hydrostatic actuator 9, a thread is tapped on the upper end of the first extension bar 9a, the first extension bar 9a is connected with the bottom end of the tension pressure sensor 8 through the thread, the first bearing seat group 10 comprises a first bearing seat 10a and a second bearing seat 10b, the first bearing seat 10a and the second bearing seat 10b are both fixedly mounted on a mounting platform 11, a first ear ring 9b is arranged at the lower end of the tested electro-hydrostatic actuator 9, a fourth pin 24 is arranged in a hole of the first ear ring 9b, two ends of the fourth pin shaft 24 penetrate out of the hole of the first earring 9b, two ends of the fourth pin shaft 24 penetrating out of the hole of the first earring 9b are respectively hinged on the first bearing seat 10a and the second bearing seat 10b, so that the lower end of the tested electro-hydrostatic actuator 9 is hinged with the first bearing seat group 10 through a fourth pin shaft 24.
As shown in fig. 1 and 2, the linear guideway 1 is fixedly connected to one of two branch ends of the T-shaped frame 5 through the first bolt group 4, the first connection plate group 15 includes a first connection plate 15a and a second connection plate 15b, the first connection plate 15a and the second connection plate 15b are respectively and fixedly mounted on the mounting platform 11, the second bearing seat group 14 includes a third bearing seat 14a and a fourth bearing seat 14b, the first bearing seat 14a and the first bearing seat 14b are respectively connected to the mounting platform 11 through the first connection plate 15a and the second connection plate 15b, a through hole is formed at the bottom of the middle end of the T-shaped frame 5, the second pin 16 is disposed in the through hole, both ends of the second pin 16 penetrate through the through hole, both ends of the second pin 16 penetrating through the through hole are respectively mounted on the third bearing seat 14a and the fourth bearing seat 14b, so that the middle end of the T-shaped frame 5 is hinged to the second bearing seat group 14 through the second pin 16 downward, the input shaft of the first angular encoder 12 is connected to a second pin 16 via a first coupling 13.
As shown in fig. 2, the upper end of the connecting piece 7 is provided with a circular through hole, the first pin shaft 6 is arranged in the circular through hole, the other end of the two branch ends of the T-shaped frame 5 is hinged with the upper end of the connecting piece 7 through the first pin shaft 6, and the lower end of the connecting piece 7 is connected with the upper end of the tension and pressure sensor 8 through the connecting bolt 23.
As shown in fig. 3, a second extension rod 22a is arranged at the upper end of the loading cylinder 22, a thread is tapped at the upper end of the second extension rod 22a, the second extension rod 22a is connected with the loading cylinder connecting block 2 through the thread, and the loading cylinder connecting block 2 is fixedly installed with the sliding block 3 through a second bolt group 2 a; the second connecting plate group 21 comprises a third connecting plate 21a and a fourth connecting plate 21b, the third connecting plate 21a and the fourth connecting plate 21b are respectively and fixedly installed on the installation platform 11, the third bearing seat group 19 comprises a fifth bearing seat 19a and a sixth bearing seat 19b, the fifth bearing seat 19a and the sixth bearing seat 19b are respectively connected with the installation platform 11 through the third connecting plate 21a and the fourth connecting plate 21b, the lower end of the loading cylinder 22 is provided with a second ear ring 22b, the third pin shaft 20 is arranged in a through hole of the second ear ring 22b, two ends of the third pin shaft 20 penetrate through the through hole of the second ear ring 22b, two ends of the third pin shaft 20 penetrating through the through hole of the second ear ring 22b are respectively installed on the fifth bearing seat 19a and the sixth bearing seat 19b, the lower end of the loading cylinder 22 is hinged with the third bearing seat group 19 through a third pin shaft 20, and the third pin shaft 20 is installed on the third bearing seat group 19; the input shaft of the second angular encoder 17 is connected to a third pin 20 via a second coupling 18.
In specific implementation, the loading cylinder 22 applies pressure or pulling force to the loading cylinder connecting block 2, the loading cylinder connecting block 2 is connected with the sliding block 3, the force applied by the loading cylinder 22 is transmitted to the linear sliding rail 1, the linear sliding rail 1 is connected with the T-shaped frame 5, the applied force is transmitted to the T-shaped frame 5, according to the lever principle, the applied force is transmitted to the tested electric dynamic and static liquid actuator 9 through the connecting piece 7 and the pulling pressure sensor 8 by the T-shaped frame 5, and loading of the tested electric dynamic and static liquid actuator is completed.
The force applied by the loading cylinder 22 to the tested electro-hydrostatic actuator 9 is measured by the tension pressure sensor 8.
The loading test method of the electric hydrostatic actuator lever loading test bed comprises the following steps:
the loading cylinder 22 utilizes the second extension rod 22a to extend upwards or retract downwards to apply tension or pressure to the tested electric dynamic and static liquid actuator 9, and according to the change of the movement direction of the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 and the direction of the stressed load force, four large quadrant loads are realized:
loading in the first quadrant: a first extension rod 9a of the tested electric dynamic and static liquid actuator 9 extends upwards, a second extension rod 22a of the loading cylinder 22 applies pressure to the first extension rod 9a of the tested electric dynamic and static liquid actuator 9, the moving direction of the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 is opposite to the direction of the load force, and the value measured by the tension pressure sensor 8 is pressure;
loading in the second quadrant: the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 extends upwards, at the moment, the second extension rod 22a of the loading cylinder 22 applies a pulling force to the first extension rod 9a of the tested electric dynamic and static liquid actuator 9, at the moment, the moving direction of the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 is the same as the direction of the received loading force, and the value measured by the tension pressure sensor 8 is the pulling force;
loading in the third quadrant: the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 retracts downwards, at the moment, the second extension rod 22a of the loading cylinder 22 applies pulling force to the first extension rod 9a of the tested electric dynamic and static liquid actuator 9, at the moment, the moving direction of the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 is opposite to the direction of the received load force, and the numerical value measured by the tension pressure sensor 8 is pulling force;
loading in the fourth quadrant: the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 retracts downwards, the second extension rod 22a of the loading cylinder 22 extends upwards, at the moment, the second extension rod 22a of the loading cylinder 22 applies pressure to the first extension rod 9a of the tested electric dynamic and static liquid actuator 9, at the moment, the moving direction of the first extension rod 9a of the tested electric dynamic and static liquid actuator 9 is the same as the direction of the load force, and the value measured by the tension pressure sensor 8 is pressure;
draw pressure sensor 8 to record and be used in pressure and pulling force on electronic hydrostatic actuator 9, first angle encoder 12 and second angle encoder 17 measure the angular displacement of revolute pair, handle the motion curve that obtains the first extension bar 9a of tested electric hydrostatic actuator 9 through the geometric relation, combine the atress condition and the motion condition of the electronic hydrostatic actuator 9 of being tested, realize carrying out further capability test and analysis.
Claims (8)
1. The utility model provides an electronic hydrostatic actuator lever loading test bench, includes mounting platform (11), its characterized in that: the test device is characterized by further comprising a sliding block sliding rail mechanism, a pulling pressure sensor (8), a T-shaped rack (5) and a tested electric hydrostatic actuator (9) which are arranged on the mounting platform (11), wherein the sliding block sliding rail mechanism comprises a linear sliding rail (1) and a sliding block (3), the sliding block (3) is embedded on the linear sliding rail (1) and slides in the horizontal direction along the linear sliding rail (1), the sliding block (3) is fixedly connected with a loading cylinder connecting block (2), the lower end of the loading cylinder connecting block (2) is fixedly connected with a cylinder rod of a loading cylinder (22), and a cylinder body of the loading cylinder (22) is hinged to the mounting platform (11); the middle end of the T-shaped frame (5) is downwards hinged to the mounting platform (11), one end of the straight-line sliding rail (1) is fixedly connected with one end of two branch ends of the T-shaped frame (5), the other end of the two branch ends of the T-shaped frame (5) is hinged to the upper end of the connecting piece (7), the upper end of the tested electric dynamic and static liquid actuator (9) is connected with the lower end of the connecting piece (7) through the tension pressure sensor (8), and the lower end of the tested electric dynamic and static liquid actuator (9) is hinged to the mounting platform (11).
2. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
the upper end of testingelectric sound liquid actuator (9) be equipped with first projecting rod (9a), screw thread has been attacked to first projecting rod (9a) upper end, first projecting rod (9a) link to each other through screw thread and drawing pressure sensor (8) bottom, first bearing seat group (10) fixed mounting is on mounting platform (11), the lower extreme of testingelectric sound liquid actuator (9) passes through fourth round pin axle (24) and first bearing seat group (10) hinged joint.
3. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
linear slide rail (1) wherein one end fixed connection through two branch ends of first bolt group (4) and T type frame (5), second bearing seat group (14) are connected with mounting platform (11) through first connecting plate group (15), the middle-end of T type frame (5) links to each other with second bearing seat group (14) are articulated through second round pin axle (16) down, second round pin axle (16) are installed on second bearing seat group (14), the input shaft of first angle encoder (12) links to each other with second round pin axle (16) through first shaft coupling (13).
4. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
the upper end of the connecting piece (7) is provided with a round through hole, the first pin shaft (6) is arranged in the round through hole, the other end of the two branch ends of the T-shaped rack (5) is hinged with the upper end of the connecting piece (7) through the first pin shaft (6), and the lower end of the connecting piece (7) is connected with the upper end of the tension pressure sensor (8) through a connecting bolt (23).
5. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
a second extension rod (22a) is arranged at the upper end of the loading cylinder (22), threads are tapped at the upper end of the second extension rod (22a), the second extension rod (22a) is connected with the loading cylinder connecting block (2) through the threads, and the loading cylinder connecting block (2) is fixedly installed with the sliding block (3) through a second bolt group (2 a); the third bearing seat group (19) is connected with the mounting platform (11) through a second connecting plate group (21), the lower end of the loading cylinder (22) is hinged to the third bearing seat group (19) through a third pin shaft (20), the third pin shaft (20) is mounted on the third bearing seat group (19), and the input shaft of the second angle encoder (17) is connected with the third pin shaft (20) through a second coupler (18).
6. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
loading cylinder (22) through applying pressure or pulling force to loading cylinder connecting block (2), loading cylinder connecting block (2) link together with slider (3), transmit the power of applying of loading cylinder (22) on linear slide rail (1), linear slide rail (1) links to each other with T type frame (5), on transmitting the power of applying again to T type frame (5), according to lever principle, T type frame (5) will apply power again through connecting piece (7) and pull pressure sensor (8) and transmit to on test electric sound liquid actuator (9), accomplish the loading to the test electric sound liquid actuator.
7. The electro-hydrostatic actuator lever loading test stand of claim 1, wherein:
the force applied by the loading cylinder (22) to the tested electro-hydrostatic actuator (9) is measured by the tension pressure sensor (8).
8. The loading test method applied to the electric hydrostatic actuator lever loading test bed of claim 1, is characterized in that:
the loading cylinder (22) utilizes the second extension bar (22a) to extend upwards or retract downwards to apply tension or pressure to the tested dynamic and static liquid actuator (9), and four quadrant loads are realized according to the change of the motion direction of the first extension bar (9a) of the tested dynamic and static liquid actuator (9) and the direction of the loaded force:
loading in the first quadrant: a first extension rod (9a) of the tested dynamic and static liquid actuator (9) extends upwards, a second extension rod (22a) of the loading cylinder (22) applies pressure to the first extension rod (9a) of the tested dynamic and static liquid actuator (9), the moving direction of the first extension rod (9a) of the tested dynamic and static liquid actuator (9) is opposite to the direction of the load force, and the value measured by the tension pressure sensor (8) is pressure;
loading in the second quadrant: a first extension rod (9a) of the tested dynamic and static liquid actuator (9) extends upwards, at the moment, a second extension rod (22a) of the loading cylinder (22) applies pulling force to the first extension rod (9a) of the tested dynamic and static liquid actuator (9), at the moment, the movement direction of the first extension rod (9a) of the tested dynamic and static liquid actuator (9) is the same as the direction of the borne load force, and the value measured by the tension and pressure sensor (8) is pulling force;
loading in the third quadrant: the first extension rod (9a) of the tested dynamic and static liquid actuator (9) retracts downwards, at the moment, the second extension rod (22a) of the loading cylinder (22) applies pulling force to the first extension rod (9a) of the tested dynamic and static liquid actuator (9), at the moment, the moving direction of the first extension rod (9a) of the tested dynamic and static liquid actuator (9) is opposite to the direction of the loaded force, and the numerical value measured by the tension and pressure sensor (8) is pulling force;
loading in the fourth quadrant: the first extension rod (9a) of the tested electro-dynamic and static liquid actuator (9) retracts downwards, the second extension rod (22a) of the loading cylinder (22) extends upwards, at the moment, the second extension rod (22a) of the loading cylinder (22) applies pressure to the first extension rod (9a) of the tested electro-dynamic and static liquid actuator (9), at the moment, the movement direction of the first extension rod (9a) of the tested electro-dynamic and static liquid actuator (9) is the same as the direction of the loaded force, and the value measured by the tension pressure sensor (8) is pressure;
draw pressure sensor (8) to record and act on pressure and pulling force on electronic hydrostatic actuator (9), first angle encoder (12) and second angle encoder (17) record the angular displacement of revolute pair, handle the motion curve that obtains first extension bar (9a) of tested electric hydrostatic actuator (9) through the geometric relation, combine the atress condition and the motion condition of tested electric hydrostatic actuator (9), realize carrying out further capability test and analysis.
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